I am a brand new user.
Files were created and designed by our vendor. Unfortunately, after project was done. The vendor also went out of business.
We have (hopefully) all the design files. However, when I tried to open a drawing .SLDDRW file, the file only briefly blinked with
a complete drawing and then displayed a dotted retangular image at the spot.
I would like to know what is missing in order to view this drawing?